39894053869 has 2 divisors, whose sum is σ = 39894053870. Its totient is φ = 39894053868.

The previous prime is 39894053861. The next prime is 39894053873. The reversal of 39894053869 is 96835049893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39826189225 + 67864644 = 199565^2 + 8238^2 .

It is a cyclic number.

It is not a de Polignac number, because 39894053869 - 2³ = 39894053861 is a prime.

It is a super-2 number, since 2×39894053869² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39894053869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39894053861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19947026934 + 19947026935.

It is an arithmetic number, because the mean of its divisors is an integer number (19947026935).

Almost surely, 2^39894053869 is an apocalyptic number.

It is an amenable number.

39894053869 is a deficient number, since it is larger than the sum of its proper divisors (1).

39894053869 is an equidigital number, since it uses as much as digits as its factorization.

39894053869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50388480, while the sum is 64.

The spelling of 39894053869 in words is "thirty-nine billion, eight hundred ninety-four million, fifty-three thousand, eight hundred sixty-nine".